Show the vulnerability report even if 0 vulnerabilities or no traditional security scanners configured

What does this MR do and why?

Show vulnerability report table even when we have 0 vulns. Prior, we relied on security scanner pipeline to exist or vulnerabilties. Container Scanning for registry runs outside of a pipeline as a background task, and may be configured, but rarely generates vulns right away. We don't want to hide the vuln table, since the container registry tab indicates separately if that feature is enabled.

Show the vulnerability report even if 0 vulnerabilities

Changelog: changed

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Related to #421315